is 2 4471717 - 1
has 1346121 decimal digits
takes 0.558 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7A57120E1D0D51A0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.644965.6716%250003625000.00781.3952%6.652766.1506%0.4789%
PrimeNet2610.068762.2951%180003600000.00662.9457%0.075363.4058%1.1107%
GPU722651.631564.6154%260005500000.00992.0887%1.641465.3545%0.7391%
Difference+2+5.0133+1.0563%-1000-187500-0.0020-0.6936%+5.0113+0.7961%+0.7961%

Known prime factors (1 factor, 67.6 bits, 0.00151241% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
44717172284678574121742075612167.63125545876160340
22 × 5 × 1277293808017
2010-02-13512772938080178.757312,58523,506

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-24T04:41:00Carsten Kossendeydurandal25000362500---0.008--1.395%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-05T00:00:00ANONYMOUSv4_computers21260--0.034--
2002-06-23T00:00:00ANONYMOUSv4_computers21261--0.069--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-03-31T00:00:00ANONYMOUSv4_computers7A57120E1D0D51A00.558
1999-12-01T00:00:00ANONYMOUSv4_computers5FFCB979A8B6AC__0.558
2001-02-11T00:00:00ANONYMOUSv4_computers7A57120E1D0D51A00.558


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T17:03:39kkmrkkblmbrbkManual testing
228467857412174207561
DE8551DFFF5F31__no
2018-02-15T00:01:35ATHec2-1xf
228467857412174207561
DE8551DFFF5F31__no


P-1 factor-bounds graph:
B1 = 25000, B2 = 362500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
261
260
250
260
270
280
290
2100
Last modified: 2018-02-15T00:01:35+00:00